Programa del congreso

Abstract– The growing trend of urban areas that apply the linear economic model is a widespread concern, due to the excessive and inconsistent use of resources to produce goods and services. Since Chepén is no stranger to this reality, a proposal for the creation of sustainable cities using the circular economy approach in the city was established through basic, non-experimental, quantitative, and cross-sectional research. It was found 3 critical points were found that mainly afflict the city, for which a proposal for sustainable cities was proposed, which was validated economically and socially, resulting as a result the viability and sustainability of the proposal in both aspects. In addition, it was validated by means of the hedonic price model, demonstrating that citizens are willing to pay more for housing with sustainable characteristics. Finally, it is concluded that Chepén presents problems regarding Waste Management, Urban Inequality and Economic Competitiveness; therefore, it is proposed the construction of a sanitary landfill with a biogas plant, training on source segregation and circular economy (education and entrepreneurship) and the design of an incentive scheme to promote good environmental practices.

To provide effective development strategies for Colombia and similar developing regions, this paper proposes the conceptual design, construction, and start-up of circular economy biorefineries using biomass (BUB) through anaerobic biodigesters. The project focuses on producing high-quality municipal biofertilizers to promote organic agriculture and generate biogas as a renewable fuel for electricity production in adapted internal combustion engines. Biogas is obtained from diverse biomass sources, mainly livestock manure and municipal organic matter (MOM), enabling a sustainable valorization of local waste streams. The implementation framework is based on a biomass circular economy (CE) model specifically designed to foster organic agricultural practices, rural reforestation initiatives, renewable fuel production, and energy self-sufficiency. This model aims to contribute to the energy transition, mitigate greenhouse gas emissions, and strengthen food sovereignty in vulnerable communities. A comprehensive thermo-economic analysis demonstrates a high rate of return on investment (ROI) and significant financial benefits by reducing dependence on carbon-intensive fuels. The results highlight the potential of this frugal innovation approach to improve local economies, create new market opportunities, and accelerate sustainable development through scalable biorefineries adapted to regional conditions.

The healthcare sector continues to face challenges related to waiting times and inefficient service management affecting directly the efficiency in the outpatient clinics. These issues are frequently linked to poorly structured workflows, limited task distribution excessive waiting times and unproductive service times that affect negatively the service quality and patient satisfaction. To address the challenges, Lean practices have been widely applied, such as queueing method to improve patient flow, workload balancing to prevent staff overload and the standardized procedures to reduce variability. The improvement tools were applied following the DMAIC structure of the Lean Six Sigma methodology, which provided a systematic approach for problem solving and process improvement. In this context, an improvement model was developed by integrating queueing method, workload balancing and standard work, through Yamazumi diagrams and Standardized Operating Procedures, focusing on operational changes that do not require additional resources of high-cost technologies. The proposed model was validated trough scenario comparison using simulation in Arena software. The results showed a 76.38% reduction in cycle time and 92.08% reduction in patient waiting time. The proposed model offers a solution for improving efficiency and patient experience in outpatient healthcare facilities.

Incorporating nanomaterials into mortars has proven to be attractive, improving their physical and mechanical properties. However, this type of additive can be expensive and difficult to manage. Therefore, in the initial phase of this research, we aimed to evaluate the effect of adding different concentrations of microsilica particles to mortars, as it is a fundamentally more economical and versatile material. This work presents the results of different tests conducted on samples with 5%, 7%, and 9% microsilica, relative to the weight of cement, and compared with a standard sample. This study revealed a positive impact of microsilica on the mortar's compressive strength at 28 days, which is one of the most determining properties for ensuring the structural performance of the material in real-world applications.